V4 engine

[Parksy]

Hi all

I'm after information on a V4 crankshaft configuration. Does it only have two throws(two rods per throw)? Are they 180 degrees apart?

For an even firing pattern, what angle is the V in the block? I'm assuming 90 degrees, but I'd like to make sure first.

Thanks all

Andy

 

[stevehuckss396]

Hi all

I'm after information on a V4 crankshaft configuration. Does it only have two throws(two rods per throw)? Are they 180 degrees apart?

For an even firing pattern, what angle is the V in the block? I'm assuming 90 degrees, but I'd like to make sure first.

Thanks all

Andy

I built the peewee . It has a 90 degree v and does not fire even. About the only way to get a four to fire even is make it an inline four or a boxer. Might be able to come up with some funky craank throw angle but I would have to sit down and see if that would work.

Yes the crank was two throws, 180 apart.

 

[Cogsy]

Why would you want it to fire even though? I love the off-beat sound of a V4. Here's a video of Steve's Peewee running:

[ame]https://www.youtube.com/watch?v=1-JRQGPswVA[/ame]

 

[Parksy]

Thank you all.

Is it an odd firing pattern because some cylinders are seperated by 90 degrees or 180 degrees?

 

[Cogsy]

If you consider each 'set' of 2 pistons on each throw, they're separated by 90 degrees and 270 degrees. Then the other set is 180 degrees out from those two. With only 4 pots to choose from, there's no way to even out the shots so I think that's what gives the 'lumpiness' that sounds so sweet.